Re: HP ProBook x360 11 G1 EE incompatible with grub

[adrian15]

1. How do you put exactly those live cds into the USB ?
Do you use the DD method or another one?

2. Can you please try Super Grub2 Disk Hybrid with the DD method?

https://sourceforge.net/projects/supergrub2/files/2.02s10-beta5/super_grub2_disk_2.02s10-beta5/super_grub2_disk_hybrid_2.02s10-beta5.iso/download

Does the menu appear for you?

3. And what about Rescatux with the DD method? Does the grub menu even
appear?

http://sourceforge.net/projects/rescatux/files/rescatux_0_51_b3/rescatux-0.51b3.iso/download

Rescatux has the same method of building than some Debian installation
disks (not the live ones).
And Super Grub2 Disk has the GNU/GRUB way of making the iso thanks to
grub-mkrescue and that's different from the Rescatux / Debian
installation implementation.

Thank you for your feedback.


El 10/12/17 a las 18:38, Michel Bouissou escribió:
> Hi,
> 
> In some (south-west) regions of France, high-school students are
> currently given (for free - I mean : from our taxes) HP ProBook x360 11
> G1 EE (Education Edition) laptop computers.
> 
> These computers come with Windows 10 and an HP EFI BIOS v. 01.09 to
> 01.11 that has no support for legacy CSM boot mode.
> 
> I believe that either this UEFI BIOS has been purposely “locked against
> grub”, or there is a serious bug.
> 
> After having disabled Secure boot, I have discovered that none of the
> usual (curent, latest versions as of 2017/12) Linux live USB sticks
> (among : Ubuntu, Mint, Debian, Manjaro, PartedMagic) was able to boot on
> this machine.
> 
> All these live USB keys normally boot using grub.
> 
> Symptoms are as follows :
> 
> - UEFI BIOS selection displays the USB key as "Windows boot manager"
> instead of the USB key make / model one is used to see on other machines ;
> 
> - Selecting this just causes the screen to go black with a blinking
> cursor and... that's the end.
> 
> - After a while I discovered that a rEFInd key
> ( http://www.rodsbooks.com/refind/ ) IS ABLE to boot, and that it "sees"
> the Linux key if both inserted at the same time.
> 
> - But trying to chain from rEFInd to the Linux key fails (black screen
> of death with blinking cursor)
> 
> - Then I discovered that a Tails Linux key ( https://tails.boum.org )
> boots easily with no problem at all on the machine... And this one boots
> from syslinux.
> 
> - I also tested and found that rEFInd is also able to chain to a Tails
> key properly.
> 
> - Then I made another experiment and try to "doctor" some Linux keys
> that couldn't boot (namely : Parted Magic and Manjaro) to remove grub
> from them and replace it with syslinux. It was not an easy task, but
> once done, it allowed both distros to boot easily and seamlessly.
> 
> - It is worth specifying that, as soon as grub is replaced with
> syslinux, the machine's BIOS doesn't call the key "Windows boot manager"
> anymore, but properly displays its brand and model.
> 
> So I can tell being 100% sure that the HP ProBook x360 11 G1 EE
> distributed to students in France will *NOT BOOT* any of the common,
> grub-based, Linux USB keys, but that it will happily boot the same keys
> when grub is replaced with syslinux.
> 
> I cannot tell for sure if this is a purposeful lock on the machine BIOS
> or a serious bug somewhere, but I felt that it deserves to be
> documented, reported and investigated.
> 
> Please copy me on replies, I'm not subscribed to this mailing-list.
> 
> Best regards.
> 
> 
> ॐ
> 

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